1.
Which problem-solving strategy is used in indirect proofs?
A.
guess and check
B.
draw a diagram
C.
working backward
D.
decision-making
Hint
2.
a
>
b
means that ___________.
A.
a
b
B.
a
+ c =
b
, for some positive number
c
C.
a
+
b
= 0
D.
a
=
b
+
c
, for some positive number
c
Hint
3.
Name the property that justifies if
a
<
b
, then
a
+
c
<
b
+
c
.
A.
Transitive Property
B.
Addition Property
C.
Comparison Property
D.
Subtraction Property
Hint
4.
Complete the section of the indirect proof.
Assume
m
A
=
m
B
and
m
B
=
m
C
.
So, by ____________,
m
A
=
m
C
.
A.
angle addition property
B.
transitive property
C.
reflexive property
D.
CPCTC
Hint
5.
Complete the section of the indirect proof.
m
W
is a right angle. Therefore,
m
W
= 90° by _______________.
A.
definition of perpendicular lines
B.
angle addition postulate
C.
definition of a right angle
D.
definition of perpendicular bisectors
Hint